package com.itheima.reggie.controller;


import com.aliyun.oss.OSSClient;
import com.aliyun.oss.internal.OSSUtils;
import com.aliyun.oss.model.OSSObject;
import com.itheima.reggie.common.R;
import com.itheima.reggie.utils.AliOSSUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;

@RestController
@Slf4j
@RequestMapping("/common")
public class CommonController {

    //上传路径
    @Value("${reggie.path}")
    private String basePath;

    @Autowired
    private AliOSSUtils aliOSSUtils;

    /*
    * 文件上传
    * */

    /*@PostMapping("/upload")
    public R<String> upload(MultipartFile file) {
        //file是一个临时文件，需要转存到指定位置，否则本次请求完成后临时文件会删除
        log.info(file.toString());

        //原始文件名(取文件的后缀名)
        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));//根据最后有一个点截取文件后缀名

        //使用uuid重新生成文件名，防止文件名称重复造成文件覆盖
        String fileName = UUID.randomUUID().toString() + suffix;

        //创建一个目录对象
        File dir = new File(basePath);
        //判断当前目录是否存在
        if (!dir.exists()){
            //目录不存在，需要重建
            dir.mkdirs();

        }

        try {
            //将临时文件转存到指定位置
            file.transferTo(new File(basePath+fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }

        return R.success(fileName);

    }*/

    /**
     * 阿里云文件上传
     * @param file
     * @return
     */
    @PostMapping("/upload")
    public R<String> alupload(MultipartFile file) throws IOException {

        log.info("文件名:{}",file.getOriginalFilename());

        String fileName = aliOSSUtils.upload(file);

        return R.success(fileName);

    }


    /**
     * 本地文件下载回显
     * @param name
     * @param response
     */
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){


        try {
            //输入流，通过输入流读取文件内容
            FileInputStream fileInputStream = new FileInputStream(new File(basePath+name));

            //输出流，通过输出流将文件写回浏览器，在浏览器显示图片
            ServletOutputStream outputStream = response.getOutputStream();

            //代表图片文件
            response.setContentType("image/jpeg");

            int len = 0;
            //用于存储读到的东西
            byte[] bytes = new byte[1024];
            //当读到-1时表示读完了
            while ((len = fileInputStream.read(bytes)) != -1){
                //写
                outputStream.write(bytes,0,len);
                //刷新
                outputStream.flush();
            }

            //关闭资源
            outputStream.close();
            fileInputStream.close();

        } catch (Exception e) {
            e.printStackTrace();
        }


    }

    /**
     * 阿里云OSS文件下载
     * @param name
     * @param response
     */
   /* @GetMapping("/download")
    public void aldownload(String name, HttpServletResponse response){



    }*/



}
